Should I still be with this guy or should I leave him?

So he is really nice and treats me well but sometimes the stuff that comes out of his mouth pisses me off. We been together over a year and a few months and he tells me he wants a baby and wants a family with me but then during sex today he was like I want to coparent and he was like I didn’t know that’s what that word meant he was like I meant us raising it together. And then another time he was like if I did get pregant and didn’t give him a girl or twins he would leave me. He said he was just kidding but I don’t know. He’s always there for me but him saying stuff like that scared me.

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What I mean is him making jokes leaving me if I didn’t give him twins and gave him a boy instead and him saying about the coparenting thing. Makes me scared he’ll leave me if I did get pregant
Should I still be with this guy or should I leave him?
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